Savings increased >20% Sometimes it pays to put all your eggs in one basket MeasureCost ($)Savings ($/yr) Payback (yr) Switch to fluorescents in hall & stair lights 1,12024,2333 weeks Motion sensors in hall & stair lights11,0005,5002 Upgrade oil boiler and controls15,0006,0002.5 Install thermostats in apartments3,0001,0003 Weatherize, seal cracks around doors & windows 20,0004,2005 Replace oil boiler with new gas boiler50,0006,5008 Triple-glazed windows instead of double-glazed 40,0003,70011 Photovoltaics on roof19,0001,25015 Bundled measures total159,12052,383 3 Source: The Cost of Saving Energy , The New York Times 15 July 2007
{}